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Java Cpu Usage Proc/stat

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final long iowaittime = sysCpu[4]; final long irqtime = sysCpu[5]; final long softirqtime = sysCpu[6]; mRelUserTime = (int)(usertime - mBaseUserTime); mRelSystemTime = (int)(systemtime - mBaseSystemTime); mRelIoWaitTime = (int)(iowaittime - mBaseIoWaitTime); mRelIrqTime In i.e. I think you want to detect the number of cores. So which one corresponds to which value ?? –codingfreak Sep 14 '09 at 9:32 @codingfreak:CPU time is difficult to calculate. have a peek here

pu_time = total time process has been using the CPU. ;; Seconds process has been running: seconds = uptime - ps_time ;; Usage: cpu_usage = pu_time * 1000 / seconds print: What is the difficulty of an encounter when a monster can transform? Calculation for ps %cpu ps calculates CPU usage in the following manner: uptime = total time system has been running. share|improve this answer answered Feb 3 '14 at 19:07 Peter Lawrey 363k41415739 So based on this information, if I wanted to see the percentage of time that the CPU

Android /proc/pid/stat

I found that awk:ing for the pid worked better, as in top -p 3343 -n1 | awk '/ 3343 /{print $10}' –Theodor Dec 16 '12 at 11:06 1 Thanks "top Has power been stripped away from the US Constitution, during the Obama Administration? From uptime it uses the first value (uptime).

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed By using output from: $ ps -p -o cputime,etimes CODE HEADER DESCRIPTION cputime TIME cumulative CPU time, "[DD-]hh:mm:ss" format. (alias time). How I can solve it? –Peter Penzov Feb 28 '15 at 23:10 see the edit for a suggestion of how store the value core-dependently. A Little Cryptic Puzzle list of files based on permission Are the following topics usually in an introductory Complex Analysis class: Julia sets, Fatou sets, Mandelbrot set, etc?

Also, you can have a look at getrusage system call which also return very interesting timing information. Proc Stat Cpu Usage Calculation When was today's radar measurement of the Earth-Sun distance made and by who? asked 7 years ago viewed 114919 times active 21 days ago Linked 1 Get Current Process CPU Usage Linux C -2 How to get a process's CPU usage in the program? http://stackoverflow.com/questions/28787946/get-cpu-load-per-core-using-java Bash regex test not working Ultimate Australian Canal At what point is brevity no longer a virtue?

In 84,7% of the time it has not been bugging on the CPU. Why are Zygote and Whatsapp asking for root? Detect ASCII-art windows made of M and S characters more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us Detect ASCII-art windows made of M and S characters What are the benefits of an oral exam?

Proc Stat Cpu Usage Calculation

You toggle 'Irix/Solaris' modes with the 'I' interactive command. http://forum.xda-developers.com/showthread.php?t=2377867 Bruteforcing a keypad lock Are the following topics usually in an introductory Complex Analysis class: Julia sets, Fatou sets, Mandelbrot set, etc? Android /proc/pid/stat ps could have given current usage – but that would require it to read data multiple times and sleep between each read. Android Java Get Cpu Usage This first sample will give the percentage since the program started. –Peter Lawrey Feb 3 '14 at 19:20 so, just to make sure I am understanding this correctly, the

Is the ps command somehow averaging the cpu usage? navigate here On my system the information is on the 8th line and 9th column hence I do: top -p $PID -n1 | awk '{if (NR ==8) print $9 }' –phil_w Apr 13 One comment says that you should change the delimiters on idle1 and cpu1...do I do the same for idle2 and cpu2? How to help reduce students' anxiety in an oral exam?

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  2. I would like to list all cores load separately.
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  5. See here for more details about /proc/stat: linuxhowtos.org/System/procstat.htm –cfred Jan 14 '14 at 0:42 Thank you very much cfred, that helped a ton!
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However I dont like searching for the PID, what if by chance the same digits appear in the free memory section or something. Not the answer you're looking for? So, for example the process from your question had a folder at /proc/3038/. Check This Out share|improve this answer answered Sep 14 '09 at 9:33 Andre Miller 9,07353750 @Andre Miller - Where does it show CPU usage % ??? –codingfreak Sep 14 '09 at 9:40

Are there any rules of thumb for the most comfortable seats on a long distance bus? Field Content pid process id tcomm filename of the executable state state (R is running, S is sleeping, D is sleeping in an uninterruptible wait, Z is zombie, T is traced i misunderstood the question.

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At what point is brevity no longer a virtue? ps_time = process start time measured in seconds from boot. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed public double readUsage(int corenum) { int j=0; int coreVal = getNumCores(); String[] toks; long idle1; long cpu1; long idle2; long cpu2; try { RandomAccessFile reader = new RandomAccessFile("/proc/stat", "r"); String load

I use etime over etimes in this sample, on calculations, only to be a bit more clear. Quick Reply Reply TheUnkn0wn View Profile View Forum Posts 26th July 2013, 08:07 PM |#3 Senior Member Thanks Meter: 881 More 251 posts Join Date:Joined: Nov 2011 Less 0.3 I'm out of ideas. this contact form Are people of Nordic Nations "happier, healthier" with "a higher standard of living overall than Americans"?

Bruteforcing a keypad lock What does the expression 'seven for seven thirty ' mean? Data retrieval ps, as well as top, uses data from files stored under /proc/ - or the process information pseudo-file system. Try and figure out faster ways to parse the file? These are the first few fields (from Documentation/filesystems/proc.txt in your kernel source): Table 1-3: Contents of the stat files (as of 2.6.22-rc3) ..............................................................................

The line you want to skip is in the /proc/stat file itself. Browse other questions tagged cpu top ps or ask your own question. What would be your next deduction in this game of Minesweeper? Can you help me to read the load properly?

My problem is in-corrent reading on quad-core mobile device like HTC One. Forgot your password? final Stats st = allProcs.get(curStatsIndex); st.rel_utime = 0; st.rel_stime = 0; st.rel_minfaults = 0; st.rel_majfaults = 0; st.removed = true; workingProcs.add(st); allProcs.remove(curStatsIndex); NS--; if (localLOGV) Slog.v(TAG, "Removed pid " + st.pid When I try to read all lines from /proc/stat these static variables are not used properly and data between the cores is messed up and the result is not accurate.

Of course 1 second for sleeping is not mandatory. more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Hacker used picture upload to get PHP code into my site ​P​i​ =​= ​3​.​2​ How did Adebisi make his hat hanging on his head? time It outputs user/system cpu time along with real elapsed time.

It will not add up to 100% unless you are lucky. (alias pcpu). When ps calculates CPU usage it uses two files: /proc/uptime The uptime of the system (seconds), and the amount of time spent in idle process (seconds). /proc/[PID]/stat Status information about the more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation java linux share|improve this question edited Mar 1 '15 at 21:59 asked Feb 28 '15 at 22:58 Peter Penzov 25832120243 add a comment| 1 Answer 1 active oldest votes up vote

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